LOINC Code 90855-8: Posterior inter-arch deviation Teeth and gum

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Posterior inter-arch deviation. It is commonly used with the system or sample type Teeth and gum.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Observation

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Posterior inter-arch deviation Teeth and gum
• Posterior inter-arch deviation
• The posterior or 'back' teeth should overlap with the top (maxillary) teeth partially overlaying to the outside. When the lower posterior teeth are partially overlaying the top, this is a posterior crossbite or inter-arch deviation most likely due to the top arch form being too narrow and too small.
• Dental; Dentistry; Nominal; Point in time; Post inter-arch deviation; Random; Teeth+gum; Typ

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions